Seismic performance of precast concrete columns with prefabricated UHPC jackets in plastic hinge zone

被引:73
作者
Guan, Dongzhi [1 ,2 ]
Chen, Zixuan [1 ]
Liu, Jiabin [1 ,2 ]
Lin, Zhiyi [1 ]
Guo, Zhengxing [1 ,2 ]
机构
[1] Southeast Univ, Sch Civil Engn, Nanjing 211189, Peoples R China
[2] Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, Nanjing 211189, Peoples R China
基金
中国国家自然科学基金;
关键词
Precast column; Grout-filled pipe splice; UHPC; Cyclic loading; SPLICE SLEEVE; PIPE SPLICE; BEHAVIOR; RC;
D O I
10.1016/j.engstruct.2021.112776
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The plastic hinges of precast concrete columns with grouted sleeves commonly occur at the column-footing connection regions, leading to difficulties in the repair and rehabilitation of precast concrete structures after catastrophic events. In this paper, new structural details are proposed to strengthen the plastic hinge area of precast columns by using local prefabricated UHPC jackets. Three specimens were tested under reversed cyclic loading to evaluate the seismic performance of the precast column strengthened with local prefabricated UHPC jackets. The results show that the specimen with the proposed prefabricated UHPC jackets shifts the damaged areas away from the column-footing connection region and achieves comparative seismic performance to that of the monolithic reference specimen. The plastic hinge length of the column strengthened with a local prefabricated UHPC jacket can be estimated by the plastic hinge length models for monolithic concrete members.
引用
收藏
页数:12
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